A heat pipe residual heat removal system is proposed to be incorporated into the reactor driven subcritical (RDS) facility, which has been proposed by MIT Nuclear Reactor Laboratory for testing and demonstrating the Fluoride-salt-cooled High-temperature Reactor (FHR). It aims to reduce the risk of the system operation after the shutdown of the facility. One of the main components of the system is an air-cooled heat pipe heat exchanger. The alkali-metal high-temperature heat pipe was designed to meet the operation temperature and residual heat removal requirement of the facility. The heat pipe model developed in the previous work was adopted to simulate the designed heat pipe and assess the heat transport capability. 3D numerical simulation of the subcritical facility active zone was performed by the commercial CFD software STAR CCM + to investigate the operation characteristics of this proposed system. The thermal resistance network of the heat pipe was built and incorporated into the CFD model. The nominal condition, partial loss of air flow accident and partial heat pipe failure accident were simulated and analyzed. The results show that the residual heat removal system can provide sufficient cooling of the subcritical facility with a remarkable safety margin. The heat pipe can work under the recommended operation temperature range and the heat flux is below all thermal limits. The facility peak temperature is also lower than the safety limits.

麻省理工学院核反应堆实验室提议将热管余热去除系统并入反应堆驱动的亚临界（RDS）设施中，用于测试和演示氟化盐冷却高温反应堆（FHR）。它旨在降低设施关闭后系统运行的风险。该系统的主要部件之一是风冷式热管换热器。碱金属高温热管的设计满足了该设施的运行温度和余热排出要求。采用前人开发的热管模型对设计的热管进行模拟，评估传热能力。亚临界设施活动区的 3D 数值模拟由商业 CFD 软件 STAR CCM + 执行，以研究该系统的运行特性。构建了热管的热阻网络，并将其整合到 CFD 模型中。对标称工况、部分气流损失事故和部分热管失效事故进行了模拟分析。结果表明，余热排出系统可以为亚临界设施提供足够的冷却，并具有显着的安全裕度。热管可以在推荐的工作温度范围内工作，热通量低于所有热极限。设施峰值温度也低于安全限值。构建了热管的热阻网络，并将其整合到 CFD 模型中。对标称工况、部分气流损失事故和部分热管失效事故进行了模拟分析。结果表明，余热排出系统可以为亚临界设施提供足够的冷却，并具有显着的安全裕度。热管可以在推荐的工作温度范围内工作，热通量低于所有热极限。设施峰值温度也低于安全限值。构建了热管的热阻网络，并将其整合到 CFD 模型中。对标称工况、部分气流损失事故和部分热管失效事故进行了模拟分析。结果表明，余热排出系统可以为亚临界设施提供足够的冷却，并具有显着的安全裕度。热管可以在推荐的工作温度范围内工作，热通量低于所有热极限。设施峰值温度也低于安全限值。结果表明，余热排出系统可以为亚临界设施提供足够的冷却，并具有显着的安全裕度。热管可以在推荐的工作温度范围内工作，热通量低于所有热极限。设施峰值温度也低于安全限值。结果表明，余热排出系统可以为亚临界设施提供足够的冷却，并具有显着的安全裕度。热管可以在推荐的工作温度范围内工作，热通量低于所有热极限。设施峰值温度也低于安全限值。